Barlock for elevator doors



lqZS

2 Sheets-Sheet v1 INVENTOR Filed Augusl 8, 1923 BARLOCK FOR ELEVATOR DOORS Oct., E@ 1926.

Vfl

BY l ure@ amd l ATTORNEY Oct. 26 1926. l,604,628

c. W. BAssETT BARLOCK FOR ELEVATOR DOORSl Filed August 8. 1923 2 Sheets-Sheet 2 INVENTOR ATTORNEYS Patented @et 2li, i926.

- STATES CYR'U Tlf. BASSETT, 0F MAPLEVOOD, NEW JERSEY, ASSLGEJGR Tl) UPPLES COMPANY, INC., A CORPORATION 0l? .NEW J BARLOCK FOR LEVATOR MBRS.

Application tiled August 8, 1923. Serial No. 656,395.

The present invention relates to harloclis for elevator doors, and more particularly to a combination lock and switch, by means of' which an elevator door may he locked in 5 position, and loy which the elevator operating circuit may loe opened and closed -with the opening and closing movements of an elevator door.

The torni of barloclrs or interlocks heretofore employed in connection with elevator doors for openin and closing the doors and simultaneously t lerewith opening and closing the elevator operating circuit, have not been satisfactory in operation, because of the fact that the electrical contact in the switch varied with slight movements of the elevator doors. The variations in the switch contacts resulted in variations or interruptions in the power transmission 'for operating the elevator. and consequently in inferior elevator operation. The switches heretofore employed have also been unsatisfactory because of the -`tact that they became more `ineticient with weara and soonwore out, be-

t cause of the slight movements ol the elevator door, Stich as would be caused by wind in the elevator shaft, or air currents due to the movements of the elevator in the shaft, which cansed wear due to the intlexibility oi the parte to permit such movement. None of the devices heretofore em loyed as far as l am aware have overcome tlie difficulties in power transmission or provided means whereliy the transmission of current through the switch would he constant after contact has once heen made.

It is the primary object of the present invention to provide a harlock and switch for elevator doors which will loclr the door in position, and which in locked position will l provide a suitable Contact which will permit slight swinging ol the door in closed position without interfering with the electrical contact in the switch.

Another object ol 'the invention is to provide a harlock and switch in which electri-v cal Contact cannot he inodeV until the door is locked in position ley the locking means employeda and in which the head oit the locking har will he guided into position in the harlock casing, and in which the conducting meinlo'er mounted upon the harlock head will he guided into contacting position loetween the condnctin" plates in the casino.

A farther o ject of the invention is to provide means whereby the various parts of the device may loe readily assembled or'taken apart for cleaning or lor replacement of worn parte, and which may he manufactured at a low cost.

A further object of the invention is to provide a harlock and switch in which the switch elements will maintain substantially perfect contact irrespective of ol the parts and in any position oi the conducting members relative to each other.

A further object of the invention is to provide means whereby metallic particles which may be ahraded from the contact surlaces of the switch elements may not cause short circuiting between the plates when 'the circuit is open.

lllith -these andl other objects in view the invention comprises the various features hereinafter described and `incre particuarly defined in the claims.

ln the accompanying drawings illustrati ing the invention Fig. 1 .represents a vertical section through a harlock and switch., showing the locking loarhead in locked position in 'the harlock casing,and the conducting roller in position between the conducting plates;

Fig. 2 is a section tollen through section 2-2 of Fig. l;

Fig. 3 is a section taken on the line fel-3 of Fig. 1 with the locking head removed to show a top view of the insulating loloclr and conductingv plates mounted thereon;

Fig. 4 is a perspective view of the loloclr Y upon which the conducting plates are mount- Puig. 5 is a detailed part sectional view of the locking loer head showing the means hy which the roller'is mounted in the head; and ce Fig. 6 is a View showing the manner of mounting the casing and har locli` in connection with an elevator door.

Referring more particularly to the drawings, 10 indicates a casing which is attached loo to the frame ot an elevator door, asshown in Fig. 6, and to whiohthe leads l2 ol the controller circuit of an elevator are conducted through a suitahle conduit. The

leads 12 are attached loy siiitalale connect-ions io "i,

to two flexible plates or spring hladesjll and 16, which are suitably insulated romeaoh other. These plates are preferably 'made so as to be interehangealile, and are composed preferably of three parte or localisations. l

q sa

A conducting member 18 in the form of a metallic cylinder is loosely carried by a locking bar 20 and is adapted to be placed in position between the plates so as to conduct current or to close a circuit through the plates. The bar 20 is carried in suitable guides 22-24 on an elevator door 26, the head of the bar being supported by means ot a. stop 28 so as to hold the bar in position for engaging the entrance or opening to the casing 10.

The conducting member 18 is a hollow metallic cylinder and is carried by means of a pin 30 in the head of the locking bar. which is composed of insulating material. The diameter of the holding pin 30 lis somewhat smaller than the diameter of the opening through the cylindrical roller 18, so as to permit movement of the roller 18, on the pin with respect to the head. The roller is cylindrical in shape so as to permit movement of the roller upon the head to attain an even wear upon the surface. of the roller and thereby prevent poor contacts between the plates and the roller.

Referring more particularly to Figs. 1 and 2 of the drawing, leads trom the controller circuit pass into the-casing through a conduit 32 and are attached to suitable terminals upon an insulated support 34 at the top of the casing. From the terminal plates of the respective terminals and leading to the vblades or conducting plates 14 and 16 are insulated lead wires 36 and 88 which are preferably soldered into the blades between the laminations thereof, and are held in place. in the casing by means ci supports 40 and4 42 which are attached to the casing by suitable means, such as rivets or screws.

Portions of the casing around the support or holding member 34 and the supports 40 and 4Q for the lead wires are suitably insulated from the metallic casino by means of suitable insulating material 46 and 48, by means of which Short circuits between various parts of the device are prevented.l

In order to guide the locking head oi the locking bar 20 into position in the casing 10, suitably flanged portions or outwardly tending plates 5G and are provided, by means of which the head is guided laterally into position. Upon the lower portion of the locking head are inclined portions or surfaces 51 and 53 which serve during closing movement of the door as cam, operating upon an edge 56 of the casing to litt the head into position within the casing. By means of the lifting movement, the head is raised so that the roller 18 is brought over the plates 14 and 16 in position to be lowered into contact with the plates. After the lower shoulder 54 upon the head has passed the upwardly bent support 56, which serves as a guide to'attain the proper elevation of the head, the. locking head drops .int-o position 64, as shown more particularly in Fig. 4 and upon a support 58, shown in Fig. 1, and simultaneously the conducting roller 18 is wedged in between the plates 14 and 16, caus ing them to spread outwardly a `short distance so as to attain a tight hold upon the roller and thereby to form an admirable contact for conducting current therethrough.

` The relative positions of the guide 56 with respect to the shoulder 54 and the plates 14 and 16 with respect to the roller 18 are such that the shoulder 54 will have passed the inner edge of the guiding portion 56, thus locking the head against withdrawal thereof,

4before the roller comes into contact with the which is preferably composed of three seotions` is provided for rigidly holding the plates in parallel position. The plates are preferably screwed into place on the outer sections of the block by mea-ns of screws as shown more particularly in Fig. 2 of the drawings. The base of the block is slightly curved upwardly at the sides so as to permit a side rocking movement of the block and plates, as is shown more particularly in,

Fig. 4 ot' the drawings. 1n order'that the block may be withdrawn from the casing l'or cleaning or other purposes, the block is provided with suitable grooves 4 and 6, which are adapted to cooperate with an upwardly bent plate 8, the sides ot which tit into the grooves. The plate 8 is preferably attached to the base or" the casing by means of rivets, which are adapted to register with corresponding depressions Si and 5 in the under side of the block which are slightly larger than the heads of the rivets so as to hold the block and still permit a limited movement of the block in place in the cas- When it is desired to' withdraw the block and plates from the casing, one of the covers 9 or 11 is removed and the block is slightly raised and moved sideways so as to permit sliding over the rivets, and along the edges of the plate 8.v The side portions of the bloclr i2 are curved or pointed towards the front and baciaA ends of the block, so as to permit rotary or swinging movement of the block in a horizontal plane.l By the means above described the block is loosely held in position within the casing and may be moved either in a horizontal plane orin a vertical plane at right angles to the plates.

ln the central section or mid-section oi the block 2 are parallel grooves 60, 62 and llO neoaeae v lf ig. 2, which are adapted to catch any particles which may fall from the contracting members due to abrasion from the roller or the surface of the plates, and which might otherwise cause a short circuit between the platesz |The grooves serve as air gaps to ,further insulate the plates from each other,

and by this means all danger of. obtaining a short circuit between the plates is avoided.v

The edges of the plates 14 and 16 are bent outwardly at the top and also `at the end portions in order to provide means for guiding the roller 18 into position between the plates., The roller 18 is adapted for movement in a plane at right angles to the pin 30 and also for, limited movement in every direction without interfering with the Contact between the platesB lt will be noted that by this construction a rigid and complete contact between the roller 18 and the plates 14E and 16 is provided, which will permit movement ot the plates and roller together without interfering with the contact between them,

lt is tobe understood that various changes or modifications may be made in the various parts of the device within the scope of the claims, without departing from the spirit or scope of the invention.'

Having thus described the invention, what is claimed as new' is:

l. ln an electric switch, apair of resilient conducting plates constituting circuit terminals, a bridging member adapted to be sprung into circuit closing position between said terminals, a bar connected to said bridging member to move said member into and out ot circuit closing position, means 'for loosely connecting said bar to said member to permit relative movement of said bar with respect to said bridging member in up and down and lateral directions whereby limited movement ot' said bar with respect to said terminals is permitted without interference with the circuit through said terminals and conducting member.

2., ln an electric switch, a pair ot yicldable conducting circuit terminals, a self centering conductingy member adapted to be seated between said terminals to close the circuit therethrough, means for moving said conducting member into and out of position between said terminals, means for permitting relative movement between said member and said means whereby lsaid means may oscillate in multiple directions without interfering with the contact between said member and v said circuit terminals,

3, ln an `electric switch adapted. for openmg and closing an elevator controller circuit, aipair of circuit terminals, a self centermg conducting roller adapted to be resiliently placed between said terminals, a bar for moving said roller into and out of engagement with said terminals, and means for permitting relative movement of said bar in all directions ina plane at right angles to the axis of said'roller, whereby a suitable contact between said, terminalsl and said roller may be maintained irrespective of slight movements of the bar with respect to said roller and terminals. l

4. In an electric switch, a casing, a pair of yieldable conducting circuit terminals in said easing, a self centering conducting roller adapted to be seated and held in pressure contact between vsaid yieldable terminals, a bar for moving said roller into and out of engagement with said terminals, means for mounting the'said roller on said bar so as to provide a limited movement thereof in all directions relative to said bar whereby, when said roller is Seated between said terminals, the bar may have a limited movement without interfering with the electrical contact between the said roller andy said terminals, and means tor guiding the said bar into said casing to bring the said roller into the desired longitudinal position before said roller is seated between said terminals. i

5, lin a device of the kind described, a casing, a pair of conducting members in said casing, means for connecting said members with an electric circuit, means `lor holding said members in a relatively hired position with respect to each other but slightly movable with respect to said casing, a contact member, a carrying member, and means for loosely mounting said contact member on said carrying member so as to permit relative movement thereof with respect to said carrying member, the said contact member being adapted to be wedged between said conducting members so as to be firmly held thereby to attain suitable electrical contact, whereby said carrying means and said con- 'Mitt mit ducting members may have a limited movjement with respect to said casing without interfering with the electrical contact between said contact member and said conducting members,a

6. ln an electric switch adaptedv for open-1 inV and closing an elevator controller circuit, a casing adapted to be mounted in fixed position, an insulated base in said casing, a pair ofl substantially parallel conducting plates having outwardly flaring edges, means t'or connecting said plates to saidbase so as to be insulated from each other, abar having an insulated head, a conducting roller, means for mounting said roller in said head so as to permit a limited tree movement therein in all directions, and means for guiding said head into said casing to bring said roller into the desired longitudinal-position in said casing before the said roller is brought into contact with said conducting plates.,

. ln an electric switch adapted for openlltl ing and closin an elevator controller circuit, a casing adapted to be mounted in fixed position, an insulated base in said casing, means for removably fastening the said base, the said means beingv adapted to permit a limited' turning movement of said hase within said casing, a pair of substantially parallel conducting plates having outwardly flaring edges, 'means for mounting said plates in said casing on said base so as to be normally insulated from each other, a bar mounted upon an elevator door so as to be movable therewith, an insulated head on said bar, a conducting roller in said head adapted to co-operate with vsaid plates to close a circuit in closed position of said door, and means'to permit a limited movement of said head in all directions in a plane at right angles to the axis of said roller without causing relative movement of the roller with respect to said plates. s

8. In an electric switch adapted for opening and closing an elevator controller circuit, a casing adapted to be mounted in ixed position, an insulated base in said casing, a pair of substantially parallel conducting lates having outwardly flaring edges, means for mounting said plates in said casing upon said base so as to be normally insulated from each other, a bar mounted upon an elevator` door so as to be movable therewith, an insulated head on said bar, a conducting roller havingy a diameter greater than the width of said head, means for loosely mounting said roller in said head `so as to permit a limited free movement thereof in all directions with respect to said head, means for wedging said roller between said plates to close said .elevator circuit, and Haring edges on the said casing for iding the said head into position therein efore said roller is brought into contact with said plates.

9. A combination barlock vand l electric switch for elevator doors comprising a casing, electrical contact members in said casing, insulating means between said members, circuit terminals connected to the said members, a locking bar,.an insulated head carried by the said bar, a conducting roller carried by the said head, a sloping support within the said casing adapted to hold said head in place longitudinally of said casing, and means for preventing withdrawal of said head from said 'casing without first lifting the said roller out of contact with said plates.

10. A combination harlock and electric switch for elevator doors comprising a casing, spring contact plates in said casing, means for holdin said plates rigidly with respect to each ot er and slightly 'movable with respect to said casing, terminals connected to' said plates, a conductin roller ada ted to seat and make contact etween sai plates, and means for loosely carrying said roller to permit movement of said carrying means without causing movement of said roller.

11. A combination harlock i and electric switch for elevator doors comprising a casing, flexible contact plates within the casing, insulating means for holding said plates rigidly with respect to each other, said means being adapted to rock in a vertical or horizontal plane, terminals connected Vto said plates, a conducting roller, and means for loosely holding said roller and for moving said roller into and out of Contact with said plates. l

12. A combination harlock and electric switch for elevator doors, comprising a casing, flexible contact plates within the casing, insulating means for rigidly holding said plates, means for flexibly fastening said holding means in said casing to permit' movement of said plates, terminals connected to-said plates, a conducting member adapted to seat and make contact between said plates, a locking bar adapted to loose' ly carry said conducting means to thereby permit movement of said bar relativet0 said conducting means without breaking said conta-ct, and means for lockin said bar in position in said casing, said locking means being in such position as to cause locking of said bar before contact is made between said conducting member and said plates.

13. A combination. barlock and electric switch for elevator doors, comprising a casing adapted to be fastened in a door frame, flexible contact plates in the casing, an insulated base for said plates adapted for a limited rocking movement, and a conductor adapted to be carried by va door, the said conductor being flexibly mounted thereon to open and close a circuit between the said plates withl opening and closing movements of said door.

14.. A combination barlock and electric switch comprising a casing, a removable insulatin base within said casing adapted for said rocking movement and limited movement in a horizontal plane, a ,pair of spring contact plates attached to said base, and a conductor adapted to be moved into and out of engagement with said plates and adapted while in engagement 'with said plates to move therewith.

15. A combination barlock and electric switch comprising a casing, an insulating base within said casing adaptedv for limited movement with respect to said casing, contact plates mounted on said base, grooves in said base to provide insulating air gaps between said plates, and a metallic conductor adapted when in position between said plates to conduct current therethrough.

16. A combination harlock and electric l a removable insulating base Within sai yals plates mounted on said base, a conducting member adapted for positioning between 'said plates and to retain its position with 17. A combination barlock and electric.

switch comprising a casing, an insulating block Within said casing, parallel spring conducting plates mounted on said block, said plates extending upwardly from said block, grooves in the block for receiving metallic particles falling from said plates to maintain insulation between said plates, and a rod having a contact portion movably mounted thereon and adapted for positioning in said casing between said plates,

18. A combination harlock and electric switch comprising a casing, an insulating block within said casing, parallel spring conducting plates mounted on said block, said plates extending upwardly from said block, grooves in the block for receiving metallic particles falling romsaid plates to maintain insulation between said plates, a

, rod having a contact portion yieldably mounted thereon 'and adapted for positioning ,in said casing to attain positive contact between said plates and said contact p0rtion, and means for holding said bar against withdrawing movement from the casing while said parts are in contact.

19. A combination harlock and electric switch comprising a casing, an insulating block within said casing, parallel spring conducting plates mounted on said block and having edges flaring outwardly from 1 said plates, grooves in said block between said plates and parallel thereto, a conducting cylinder adapted for positioning between said plates and for being guided into position by said flaring edges, said cylinder being slightly greater in diameter than the distance between. said plates to be rigidly held between them, a bar slidably mounted upon an elevator door, a locking head upon. said bar adapted to carry said cylinder, means for guiding said head into said casing, and means upon said head for lifting said head when the elevator door is closed so as to position said .roller in the casin above said plates and thereby to be guided into position by said flaring edges, and means for locking said head in osition in said casing before contact is ma e between said plates and said conducting cylinder.

20. In a device of the kind described, a movable block, lexible conducting members attached to said block, conducting wires attached to said members, a conducting member adapted to be wed ed in between said flexible conducting mem ers, and an insulating head for carrying said conducting member adapted for positioning between said conducting members.

21. In a device of the kind described, an insulating block, flexible conducting plates rigidly mounted on said block so as to be parallel with respect to each other, grooves in said block providing air gaps therein between said plates, the base of said block having sides curving upwardly in a plane at right angles to said plates to permit side rocking movement of said base and plates, and means in said plates for attaching conducting wires thereto.y l

August, 1923.

CYRUS W. BASSETT.

Signed at Hoboken, N. J., this lstday of 

